Steel-grit blast-machine.



'R.J.BARR.

STEEL GBIT BLAST MAOHINE.

APPLICATION FILED emma, 1912.

1,089,388- y Patented Mar. lo, 1914 8 SHEETS-SHEET l.

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STEEL GRIT BLAST MACHINE.

APPLIOATION FILED SEPT. 9, 1912.

PatentedMar.. 10, 1914.

8 SHEETS-SHEET 2.

l Fig 2 @Mm/nag R. J. BARR. STRRL GRIT BLAST MACHINE.

APPLICATION FILED SEPT. 9, 1912. 1,0899388, l Patented Mar. 10, 1914.

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ROBERT J'. BARR, 0F ERIE, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF TO JOSEPH N.

n GERMAIN, OF ERIE, PENNSYLVANIA.

STEEL-GEII' :BLAST-MACHINE.

Specication of Letters Patent. Pwheanteed Maar., lll), 19114.

roeaaee.

Application led September 9, 1912. Serial No. 719,364. t

The object of the invention is to treatcastings so as to remove the scale from them. In the present device the castings are subjected While being agitated to the action of steel grit under blast.

The invention is illustrated in the following drawings as follows Figure 1 shows a vertical section on the line 1--1 in Fig, 2. Fig. 2 shows an end view of the working parts, the outer late of the frame being removed. lll`ig3 s ows a top view of the machine. Fig. 4 a section of the nozzle and adjacent parts.

1 marks the tumbling barrel. The barrel is provided with a perforated peripheral shell. and has the usual tracks 2 at its ends which rest on the rollers 3 and 4, the rollers 4 beingshown in dotted lines in Figs. 2 Aand 43.

The barrel is driven from rollers 3, these being rotated in the directionindicated by the dotted arrow in Figa-2 so as to give to the side of the barrel above the rollers 3 an upward movement. This arrangement carries the castings within the barrel to a position above the rollers 3, therefore, the greater part of the weight of the barrel is supported by the rollers 3 so that the movement of the rollers 3 is readily conveyed to the barrel. The rollers 3 are fixed on the shaft 5, andthe shaft 5 is journaled in the bearing 6 in the end plates 7a and 8 of the frame, The rollers 4 are mounted .on the l shaft 9 and the shaft 9'is journaled in the bearings 10 arranged in the end plates 7 and 8.

plete the frame. The bottom plate 14 has the channels 15 arranged therein and s0 slanted as to carry the grit as it comes from the barrel to the sides of the machine where 1t 1s taken up andcarried to position for re-use by mechanism hereafter described.

The machine is driven by a pulley 16, the pulley 16 is fixed to a shaft 17 extending across the top of the machine. Shaft 17 is Journaled in the bearing 18 in the plate 8, and bearing 19 arranged on top plate 13. An outside bearing 20 is also provided for the shaft 17, the bearing 20 being xed on the plate 21. The .plate 21 is parallel to the plate 8 but separated therefrom. A sprocket 22 is fixed on the outer end of the shaft 17, and this sprocket 22 isA connected by a chain 23 (shown in outline) with a sprocket 24, the sprocket 24 being xed on the shaft 5. Through the mechanism just described the shaft 5 is driven and the barrel rotated.

The heads 25 of t-he barrel are stationary.

They are separated from the plates 7 and 8 so as to make what is in effect a manifold 26 for the perforations in the ends. Tubes 27 lead to and from the faces 26 and are connected with means for effecting a scavenging circulation of air so as to carry off the dust as it is created in the barrel.

The castings in the barrel are apt to catch on the heads or between the end heads and 4the barrel shell. To obviate this the barrel 1s provided with the inwardly extending and slanting shoulders 28 and these shoulders acting on the castings throw the mass away from the ends of the barrel and thus prevent thev danger of the castings catching on the heads or between the heads and the rotating part of the barrel.

A movable plate 30 is arranged opposite the plates 7 and 7 and the plates 30 and 21 I have the anges 31 which extend to the plates 7, 7l and so as to form an inclosed space between said plates. The gritV as it is conveyed by the spouts 15 is deposited in the pockets 29, the plate 30 with its fiange 31 having a supplelnental inner plate 32 for completing this pocket, the plate 32 being secured to move with the iiange 31. The elevators 33 extend from the pockets 29 to the top of thcspace between the plates. The lower ends of the elevators run on the sprockets 34. The sprockets 34 are mounted on the shafts 35 and the shafts 35 are carried by the bearings 36, these bearings being secured to the plates 21 and 30. The upper end of the elevator ruiming in the space within the plate 2l runs over a sprocket 37 and this s n'ocket is fixed on the shaft 17 and thus gives to this elevator its movement. The upper end of' the elevator within the plate 30 runs over a sprocket rlhe sprocket 3S is fixed on the shaft 3f), and the shaft 39 is journaled in the bearing 40. The bearing 1G is carried on the plate 7. A clutch formed by the member ll-l fixed on the shaft 89 and member 42 fixed on tbe shaft 17 is arranged to drive the sba't't SQ/andthus the eonveyer or elevator The grit taken by these elevators from the pockets 29 is carried by said elevators and delivered to the hoppers 43 near the top of the machine, the wallsv of the hopper being carried by the plates 30 and 2l and being of sufficient depth to form an inclosure with the plates 7 and 8;

The bottom walls 44 of the hoppers 43 are inclined so as to carry the grit toward the wall adjacent to the barrel and the plates 7 and 8 have the curved surfaces 45 adjacent to the bottom of the hopper. 'The nozzles 4-6 are provided with'langcs 47,the flanges having curved surfaces 48 corresponding to the surfaces 115 of the plates 7 and 8. The nozzles are secured to plates 7 and 8 by screws 49 which extend through the slots 50 in the flanges t7 and into the plates 7 and 8. The nozzles have the usual hardened ends which are removable. The air pipes 52 extend through passages 53 immediately above the bottoms /l-t and extend into the' nozzles so that when air is forced into the nozzles grit is entrained and carried through the nozzles in the forni of blast and delivered to the barrel. The passage provides an air opening permitting an inflow ot air through the hopper around the air pipe and this terminates adjacent to the nozzle. The air at the nozzle injects air by way of the passage 53 and this prevents the arching ot the grit at the bottom o't the hopper and assures the continuous entraining ot the grit by the air so as to permit a continuous blast.

The nozzles, clearly shown in Figs. 1 and 2, extend through the heads 25 ot the barrel. They are arranged adjacent to the upward moving side of the barrel soms to deliver their blast upon the crest ol the mass ot the castings as they roll over by reason ot the upward movement of this side ot' the barrel. The nozzles are also so arranged as to be just above this crest and by means of the adjustment providedmay be made to turn the blast directly to the crest thus formed so that all the castings as they turn in their rolling moven'ient are subjected to the'blast. It will also be noted that this arrangement of the nozzles in connection with the roller support for the barrel leaves the body ofthe barrel undisturbed so that the danger of castings clogging in the barrel as the barrel turns is obviated.

l provide a convenient means for shutting oftl the flow ol grit from each nozzle. The pipe 52 extends within the plates 30 or 2l. It lever arm is journaled by nleans et the pin 5G in the bearing 57, the outward movement ol the lever being limited by a screw 58. The free end of the lever 55 is connected to a link 59 by means ol a pin GO. The link 59 'is connected to a clamp (5i by means of a pin 62. A lever (Sil is tixed on the pin 56 provided with a handle Gt. ly means of this lever the air pipe may be forced into the nozzle l0 so as lo close the nozzle against an outflow of grit. rlbe out ward position of the air pipe may be adjusted by the screw 58 so as to give the best results.

lt will be noted that the nozzles 4G may be adjusted not only relatively to the supporting plate but also to the air pipe 52. ln order to charge the barrel it is desirable to have one of the ends of the trame movable so as to remove the bead 25 of the barrel. ln the present construction oneend ot the frame is hinged and carries with it one head of the barrel. The rear trame plate l2 is provided with the hinge lugs and the plate 30 has .the hinge lugs (SG arranged to operate with the hinge lugs G5. lintles G7 are provided for completing the hinge. The heads 25 are secured to the adjacent plates, by the bolts (38 (see Fig. lt) radial distance pieces GS spacinfy the head from the plate to forni the manifold 2G. The plate 7 is separated from the plate 7 on a line with the opening of the barrel so that as the end frame is swung outwardly on the hinge the plate 7 is'earried with the `trame plate 30 and the head 25 is carried with the plate 7. 'lhe elevator is also carried with this swinging frame, the clutch member 4l disengaging from the clutch member 42 to permit this swinging movement. It will also be observed thatjthe pocket 2S) within the plate 30 is made complete in the swinging frame by means of the plate 32. When this frame is= swung out the end of the barrel is open to permit the removal of' finished castings and the recharging ot the barrel.

While l have designated my machine as a steel grit blast machine and so described it, it will be understood that any granulated abrasives other than steel grit may be used with the machine.

What I claim as new is:-

l, ,Tn a. steel grit blast machine, the combination of a barrel; means for rotating the barrel; a stationary bead for said barrel; and a steel grit nozzle extending through said head adjacent to the side ozt the barrel having an upward movement and directed lili) .onto the crest of the material as it is formed imanes bythe rotating barrel, said nozzle terminating at a point adjacent to the head.

2. In a steel grit blastmachine, the coinbination of a barrel,` said barrel having a beveled shoulder adjacent to one of its heads; means for supporting and rotating said barrel; a stationary head Within the beveled shoulder; and devices for delivering a blast to the barrel.

3. In a steel grit blast machine, the combination of a barrel; a steel grit blast nozzle directing a blast of grit to the interio-r of the barrel; perforated stationary heads for said barrel; and .means for delivering a scavenging blast to one head and conveying said scavenging blast from the opposite head.

.4. In a steel grit blast machine, the combination of a barrel; a steel grit blast nozzle directing a blast of grit to the interior of the barrel; perforated stationary heads for said barrel; and means for ydelivering a scavenging blast to one head and conveying said scavenging blast from the opposite head comprising a manifold for each head and passages leading to and from said manifolds.

5z In a steel grit blast machine, the combination of a barrel; a head for said barrel; an end,frame adjacent to said head; devices for elevating grit carried by said frame; means for movably supporting said frame, said means permitting the movement of said frame to permit the removal of the head of thebarrel; and driving devices for said elevating means. j

G. In a steel grit blast machine, the combination of a barrel; a head for said barrel; mechanism for driving the barrel; an end frame adjacent to said head; devices for elevating grit carried by said frame; means for movably supporting said frame, said means permitting the movement of said frame to permit the removal of 'the head from the barrel; and driving devices for said yelevating means, said driving devices being connected With thevdriving mechanism of the machine, the connection permitting the movement of the end frame.

7. In a steel grit blast machine, the combination of a barrel; a stationary head for the barrel; a frame adjacent to the head having a grit pocket at the bottom and a hopper at the top; an elevator carried by the frame for carrying grit from the pocket to the hopper; a mounting for the frame permitting the movement of the -frame away from the end of the barrel.

8. In a steel grit blast machine, the combination of a barrel; a non-rotatable head for the barrel; a frame adjacent to the head having a grit pocket at the bottom and a hopper at ,the top; an elevator carried by the frame carrying grit from the pocket to the hopper; and a mounting for the frame permitting the movement of the frame away from theend of the barrel, the barrel head being secured to said frame.

9. In a steel grit blast machine, the combination. of a barrel; a removable head for the barrel; a frame adjacent to the removable head; a grit pocket and hopper in the frame; an elevator connecting the pocket and hopper; a shaft for driving the elevator; a drive shaft lfor the barrel; and a detachable clutch for connecting'the elevator shaft With the drive shaft.

10. In a steel grit blast machine, the combination of a barrel; means for actuating the barrel; a stationary head for said barrel; a steel grit Ablast nozzle extending through said head; means for adjusting said nozzle relatively to said head, said means comprising curved supporting surfaces and curved flanges on the nozzle; and devices or securing the flanges to said curved suraces.

11. In a steel gritl blast machine, the combination of a barrel; means for actuating the barrel; a stationary head for the barrel; a nozzle extending into the barrel; means for adjusting the direction of the nozzle; an air pipe extending into the nozzle in position to entrain grit, said air pipe being free from the nozzle to permit the adjustment of the direction of the nozzle independently of the direction of the air pipe.

l. In a steel grit blast machine, the coinbination of a barrel; means for actuating the barrel; a stationary head for said barrel; a curved supporting plate for a nozzle; a nozzle having a curved flange secured to the said plate and extending through the head of the barrel and directing the blast to or nearthe side Wall of the barrel.

I3. In a steel grit blast machine the com bination of a barrel; means for actuating the barrel; stationary heads for the barrel; blast nozzles extending through the heads and directioned to carry a blast of material adjacent to the side walls of theJ barrel.

j I4. In a steel grit blast machine, the combination of a barrel; a stationary head for the barrel; a grit hopper adjacent to the head; a nozzle extending directly from the hopper into the barrel; and means for da livering air to the nozzle to entrain the grit from the hopper.

15. In a steel grit blast machine, the combination of a barrel; a hopper adjacent to the end of the barrel; a nozzle leading from vent the arching of grit adjacent\to the nozzle.

16. In a steel grit blast machine, the combination of a barrel; stationary heads for 'the hopper to the barrel; an air pipe leadv the barrel; end frames for the machine having grit pockets at their bottoms and hoppers at their tops; elevators for said frames lor conveying the grit from the pockets to the hoppers'; nozzles extending from the hoppers through the heads of the barrel; and means for supplying an air blast to the nozzles.

17. In a steel grit blast machine, the combination of a barrel; stationary heads for the barrel; end frames for the machine having grit pockets at their bottoms and hoppers at their tops; elevators for said frames for conveying the grit from the pockets to the hoppers; nozzles extending from the hoppers through the heads of the barrel; and means for supplying an air blast to the nozzles, one of said frames being movable with its pocket, hopper and elevator for opening the end of the barrel.

In testimony whereof l have hereunto set my hand in the presence of tWo subscribing Witnesses.

RUBEIRT l BARR.

Witnesses:

C. D. HIGBY, B. M. HARTMAN. 

